Addresses the issue of how we know what learners know based on evidence from second language (L2) learners' spontaneous speech samples gathered longitudinally. Examines some of the problems involved in the analysis of spontaneous speech, with focus on second language studies within the generative framework. Considers the effects of the comparative…

Suggests a methodology for studying second language acquisition that is concerned with gaining insight into the use, development, and possible fossilization of interlanguage in important real-life situations. Specific interest is focused on the understanding ability of the non-native speaker to use English in discussing a technical field. (65…